86973991015 has 4 divisors (see below), whose sum is σ = 104368789224. Its totient is φ = 69579192808.

The previous prime is 86973990997. The next prime is 86973991037. The reversal of 86973991015 is 51019937968.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86973991015 - 2¹¹ = 86973988967 is a prime.

It is a super-2 number, since 2×86973991015² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8697399097 + ... + 8697399106.

It is an arithmetic number, because the mean of its divisors is an integer number (26092197306).

Almost surely, 2^86973991015 is an apocalyptic number.

86973991015 is a deficient number, since it is larger than the sum of its proper divisors (17394798209).

86973991015 is a wasteful number, since it uses less digits than its factorization.

86973991015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17394798208.

The product of its (nonzero) digits is 3674160, while the sum is 58.

The spelling of 86973991015 in words is "eighty-six billion, nine hundred seventy-three million, nine hundred ninety-one thousand, fifteen".